1) If you like supernatural shows, you'd probably enjoy The X-Files. Some of the episodes are pretty cheesy, and the big conspiracy behind the whole series leads to nowhere, but it's a fun watch regardless.
2) Comedy wise, I'd recommend Community and Arrested Development. Archer's a fantastic show, too, and It's Always Sunny In Philadelphia is hysterical (though the short first season can be a bit slow). I'm really getting into Childrens Hospital now, and since the episodes are only 10-12 minutes each, it's easy to get into.
3) If you want a sublime mix of the supernatural and comedy... try Garth Merenghi's Darkplace. It's only 6 episodes long, so you won't need to worry about commitment all that much.

Most of this is just seconding what Gahars said but I get most of my TV suggestions from him anyway so...

Community and Arrested Development are probably the two best sitcoms I've seen. Both are well written, have interesting characters, and are, of course, funny.

If you wanted something supernatural or sci-fi I might give a suggestion to Falling Skies. I started watching it recently and it's not a bad show but it feels like it suffers from a lot of logic holes and some things feel unexplained. I'm only a few episodes in though.

Breaking Bad is alright, it just suffers from some major slow points at times. There's just spans of episodes that feel entirely filler. However when it does pick up it's usually quite good. Fourth season finale was excellent, in fact I wish it ended on that.

The Walking Dead is an excellent show if you wanted drama/horror. Great cast of characters and the new season looks rather promising with the exception of Katanarama.

Burn Notice is good, just finished catching up to that recently. It's a bit cheesy at times but it's just a fun show. Also it has Bruce Campbell.